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Byju's Answer
Standard XII
Mathematics
Equation of a Plane : Vector Form
Find the equa...
Question
Find the equation of the plane that contains the point
(
1
,
−
1
,
2
)
and is perpendicular to each of the planes
2
x
+
3
y
−
2
z
=
5
and
x
+
2
y
−
3
z
=
8
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Solution
we have,
drs of required plane
=
→
n
=
n
1
×
n
2
n
1
→
2
x
+
3
y
−
2
z
=
5
→
(
2
,
3
,
−
2
)
n
2
→
x
+
2
y
−
3
z
=
8
→
(
1
,
2
−
3
)
→
n
=
∣
∣ ∣
∣
i
j
k
2
3
−
2
1
2
−
3
∣
∣ ∣
∣
⇒
n
=
(
−
5
,
4
,
1
)
Equation of the required plane is
−
5
x
+
4
y
+
z
+
d
=
0
Given that plane contains the point
(
1
,
−
1
,
2
)
it should satisfy the equation of the plane.
−
5
(
1
)
+
4
(
−
1
)
+
2
+
d
=
0
−
5
−
4
+
2
+
d
=
0
d
=
7
Therefore the required equation is,
∴
−
5
x
+
4
y
+
z
+
7
=
0
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0
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Equation of a Plane : Vector Form
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